You'd be hard-pressed to find similarities between the Amazonian jungles of Brazil and the mountains of Afghanistan, but there are some. Air Force Gen. Richard B. Myers, chairman of the Joint Chiefs of Staff, kicked off a trip to South America with a stop here in the capital of Amazonia. During a briefing from Brazilian Maj. Gen. Eduardo Dias da Costa Villa Boas, the commander of army forces in the region, Myers was struck by the similarity of tactics the coalition uses in Afghanistan and tactics the Brazilian government is using in this far-flung region of the country. The Brazilian...